CN101784398A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
CN101784398A
CN101784398A CN200880104202A CN200880104202A CN101784398A CN 101784398 A CN101784398 A CN 101784398A CN 200880104202 A CN200880104202 A CN 200880104202A CN 200880104202 A CN200880104202 A CN 200880104202A CN 101784398 A CN101784398 A CN 101784398A
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CN
China
Prior art keywords
wheel
protuberance
axial region
hub wheel
joint member
Prior art date
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Granted
Application number
CN200880104202A
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Chinese (zh)
Other versions
CN101784398B (en
Inventor
小泽仁博
梅木田光
浅野祐一
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NTN Corp
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NTN Corp
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Publication of CN101784398A publication Critical patent/CN101784398A/en
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Publication of CN101784398B publication Critical patent/CN101784398B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0005—Hubs with ball bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0015—Hubs for driven wheels
    • B60B27/0021—Hubs for driven wheels characterised by torque transmission means from drive axle
    • B60B27/0026—Hubs for driven wheels characterised by torque transmission means from drive axle of the radial type, e.g. splined key
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0015—Hubs for driven wheels
    • B60B27/0036—Hubs for driven wheels comprising homokinetic joints
    • B60B27/0042—Hubs for driven wheels comprising homokinetic joints characterised by the fixation of the homokinetic joint to the hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0078—Hubs characterised by the fixation of bearings
    • B60B27/0084—Hubs characterised by the fixation of bearings caulking to fix inner race
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0094—Hubs one or more of the bearing races are formed by the hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • F16C35/0635—Fixing them on the shaft the bore of the inner ring being of special non-cylindrical shape which co-operates with a complementary shape on the shaft, e.g. teeth, polygonal sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
    • F16D1/0858—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to the elasticity of the hub (including shrink fits)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/2237—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts where the grooves are composed of radii and adjoining straight lines, i.e. undercut free [UF] type joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/60—Positive connections with threaded parts, e.g. bolt and nut connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22326—Attachments to the outer joint member, i.e. attachments to the exterior of the outer joint member or to the shaft of the outer joint member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7026—Longitudinally splined or fluted rod

Abstract

A bearing device for a wheel, in which circumferential play is suppressed, in which a hub ring and an outer joint member of a constant velocity universal joint can be connected to each other with good workability, and in which the hub ring and the outer joint member are adapted to be separable for excellent maintainability. In the bearing device, the hub ring (1), a double-row roller bearing (2), and the constant universal joint (3) are unitized, and the hub ring (1) and a shaft (12) of the outer joint member of the constant universal joint (3), which is fitted in a hole (22) of the hub ring (1), are separably joined to each other by a groove-ridge fit structure (M). Ridges (35) extending in the axial direction are provided either the outer diameter surface of the shaft (12) of the outer joint member or the inner diameter surface (37) of the hole (22) of the hub ring (1). The ridges (35) are press-fitted into the other in the axial direction to form grooves (36) in the other such that the grooves (36) are in intimate contact with the ridges (35). Thus, the groove-ridge fit structure (M) is formed, in which the ridges (35) and the grooves (36) are in close contact with each other in the entire area of the fit-contact portion (38) between the ridges (35) and the grooves (36). The groove-ridge fit structure (M) allows separation between the hub ring and the outer joint member performed by pulling force applied in the axial direction.

Description

Bearing apparatus for wheel
Technical field
The present invention relates to a kind of being used in vehicles such as self-propelled vehicle is freely bearing apparatus for wheel of rotation with wheel with respect to body mount.
Background technology
In bearing apparatus for wheel, the second generation that has the vehicle body mounting flange from the structure of the independent use multiple row antifriction-bearing box that is called as first generation one on member is externally evolved, and further exploitation has, the periphery of wheel hub wheel that has the wheel mounting flange in one is with a side's of multiple row antifriction-bearing box the integrally formed third generation of inboard raceways face, and then, exploitation has at the wheel hub wheel Constant velocity joint is integrated, and at the periphery of the lateral joint member that constitutes this constant speed Hooke's coupling bearing apparatus for wheel in the 4th generation that the opposing party's of multiple row antifriction-bearing box inboard raceways face is integrally formed.
For example, in patent documentation 1, record the bearing apparatus for wheel that is called as the third generation.As shown in figure 10, the bearing apparatus for wheel that is called as the third generation possesses: wheel hub wheel 102, and it has the flange 101 that extends to the external diameter direction; Constant velocity joint 104, it is taken turns hub wheel 102 at this and is fixed with lateral joint member 103; External member 105, it is configured in the outer circumferential side of wheel hub wheel 102.
Constant velocity joint 104 possesses: described lateral joint member 103; Inner contact member 108, it is configured in the bowl-shaped portion 107 of this lateral joint member 103; Ball 109, it is configured between this inner contact member 108 and the lateral joint member 103; Retainer 110, it keeps this ball 109.In addition, be formed with spline part 111, in this centre hole, be inserted with the end spline part of not shown axle, and the spline part 111 of inner contact member 108 sides is engaged with the spline part of a side at the inner peripheral surface of the centre hole of inner contact member 108.
In addition, wheel hub wheel 102 has a portion 113 and described flange 101, and in the outstanding barrel-contoured guide portion 115 of weak point that is provided with of the outer face 114 (end face of joint opposition side) of flange 101, this guide portion 115 is equipped with not shown wheel and brake disc.In addition, guide portion 115 comprises first 115a in big footpath and second 115b of path, is embedded with wheel outside on first 115a, is embedded with brake disc outside on second 115b.
And the outer peripheral face of bowl-shaped portion 107 side ends of tube portion 113 is provided with notch 116, inner ring 117 is arranged in that this notch 116 is chimeric.Near the flange of outer peripheral face of the tube portion 113 of wheel hub wheel 102, be provided with the first inboard raceways face 118, be provided with the second inboard raceways face 119 at the outer peripheral face of inner ring 117.In addition, be provided with bolt mounting holes 112, and be equipped with at this bolt mounting holes 112 and be used for wheel and brake disc are fixed on boss bolt on this flange 101 at the flange 101 of wheel hub wheel 102.
The two row outboard raceway faces 120,121 that are provided with in interior week of member 105 externally, and be provided with flange (vehicle body mounting flange) 132 in its periphery.And the first outboard raceway face 120 of external member 105 is relative with the first inboard raceways face 118 of wheel hub wheel 102, and the second outboard raceway face 121 of external member 105 is relative with the roller surface 119 of inner ring 117, has clamped rolling body 122 between them.
In the tube portion 113 of wheel hub wheel 102, be inserted with the axial region 123 of lateral joint member 103.Axial region 123 is formed with threaded portion 124 in the opposite end of its bowl-shaped portion, is formed with spline part 125 between this threaded portion 124 and bowl-shaped portion 107.In addition, be formed with spline part 126 at the inner peripheral surface (aperture surface) of tube portion 113 of wheel hub wheel 102, when this axial region 123 was inserted the tube portion 113 of wheel hub wheels 102, the spline part 125 of axial region 123 sides engaged with the spline part 126 of taking turns hub wheel 102 sides.
And, be bolted with nut member 127 in the threaded portion 124 of the axial region of giving prominence to from tube portion 113 123, wheel hub wheel 102 and lateral joint member 103 are linked.At this moment, outer face 129 butts of inner end surface of nut member 127 (the inside) 128 and tube portion 113, and the end face 130 of the axial region side of bowl-shaped portion 107 and outer face 131 butts of inner ring 117.That is, by clamp nut member 127, make the wheel hub wheel 102 across inner ring 117 by nut member 127 and bowl-shaped portion 107 clampings.
Patent documentation 1: TOHKEMY 2004-340311 communique
In the past, as mentioned above, the spline part 125 of axial region 123 sides engaged with the spline part 126 of wheel hub wheel 102 sides.Therefore, need be to axial region 123 sides and the two enforcement spline processing of wheel hub wheel 102 sides, cost is uprised, and the spline part 125 that need make axial region 123 sides when being pressed into is concavo-convex involutory with the spline part 126 of wheel hub wheel 102 sides, at this moment, owing to make the flank of tooth involutory, when being pressed into, may damage (gnaw and cut) this shaggy tooth.In addition, if do not make the flank of tooth involutory, and during with big footpath involutory being pressed into of shaggy tooth, be easy to generate the loosening of circumferencial direction.So, when the circumferencial direction existence was loosening, the transitivity of moment of rotation was poor, and may produce noise.Therefore, shown in the past, when utilizing spline chimeric, be difficult to the damage of shaggy tooth and loosening the two of circumferencial direction are avoided.
In addition, the nut member 127 that need be spirally connected in threaded portion 124 from the outstanding axial region 123 of tube portion 113.Therefore, need the screw threads for fastening operation when assembling, operability is poor, and components number is many, and component management is also poor.
Summary of the invention
The present invention is in view of above-mentioned problem, a kind of following bearing apparatus for wheel is provided, promptly, can realize suppressing the loosening of circumferencial direction, and, the binding operation of the lateral joint member of wheel hub wheel and Constant velocity joint is good, and takes turns hub wheel and can separate with the lateral joint member of Constant velocity joint, thereby maintainability is good.
Bearing apparatus for wheel of the present invention will be taken turns hub wheel, the multiple row antifriction-bearing box, Constant velocity joint carries out modularity, and the axial region that wheel hub wheel and intercalation go into to take turns the lateral joint member of the Constant velocity joint in the hole portion of hub wheel can combine discretely via concavo-convex embedded structure, will be in the aperture surface of the hole portion of the outer diametric plane of the axial region of lateral joint member and wheel hub wheel the either party be provided with and the protuberance that extends in the axial direction is pressed into the opposing party vertically, and utilize protuberance to connect airtight chimeric recess with protuberance in the opposing party's formation, thereby the described concavo-convex embedded structure that connect airtight in the whole zone, chimeric contact site that constitutes protuberance and recess, and this concavo-convex embedded structure is allowed the separation that produces by applying axial withdrawal force.
According to bearing apparatus for wheel of the present invention, therefore concavo-convex embedded structure in this embedded structure, radially and circumferentially can not form the loosening gap that produces because connect airtight in the whole zone, chimeric contact site of protuberance and recess.And if the axial region of lateral joint member is applied axial withdrawal force, the lateral joint member unloads in hole portion that then can the trailing wheel hub wheel.And, after the hole portion of the axial region trailing wheel hub wheel of lateral joint member is extracted,, then can constitute the described concavo-convex embedded structure that connect airtight in the whole zone, chimeric contact site of protuberance and recess if once more the axial region of lateral joint member is pressed into the hole portion of wheel hub wheel.
The axial region that preferably will take turns hub wheel and lateral joint member carries out bolt via bolt component, and described bolt component screws togather with the tapped bore of the axle center part of the axial region that is formed on the lateral joint member vertically.Thus, the axial region trailing wheel hub wheel of restriction lateral joint member comes off vertically.
The oral area of inner contact member is housed in described lateral joint member possesses and from the bottom of this oral area the outstanding described axial region that is provided with, the fastened and inner ring that externally be embedded in the antifriction-bearing box of wheel hub wheel in the end of wheel hub wheel applies and gives pressure.At this moment, when carrying out between the fastening fastening part gap being set,, also dispose the leak free containment member is carried out in this gap even be lateral joint member and wheel hub wheel contacting structure at the oral area of lateral joint member and to the end of wheel hub wheel.
Leakproofing material is located between the seat surface and inwall of bolt component, and described bolt component carries out bolt to the axial region of wheel hub wheel and lateral joint member.
The protuberance of described concavo-convex embedded structure also can be set at the axial region of lateral joint member, and the hardness ratio that makes the axial end portion of this protuberance is at least taken turns the hole portion inside diameter height of hub wheel, by described axial region is gone into to take turns the hole portion of hub wheel from the axial end portion side pressure of protuberance, utilize this protuberance to connect airtight chimeric recess with protuberance, constitute described concavo-convex embedded structure in the hole portion aperture surface formation of wheel hub wheel.If at this moment, form face (the hole portion aperture surface of wheel hub wheel) by the recess that makes protuberance be absorbed in the other side's side, hole portion becomes the state of hole enlargement slightly, and allows moving axially of protuberance, and axial mobile stopping, then hole portion in order to return original diameter undergauge.Thus, the chimeric position of the recess of protuberance integral body is with respect to connecting airtight with its corresponding concave part.
Preferably take in the incorporating section of the portion of extruding in the axial region outside diameter setting of being abutted against an opposition side than concavo-convex embedded structure, this extrudes portion by forming and produce based on the described recess that is pressed into.At this, the portion of extruding is the quantity of material that the chimeric position of the recess of protuberance embeds the capacity of (chimeric) recess, by the quantity of material that extrudes from the recess that forms or by the quantity of material that cuts in order to form recess or by the quantity of material of extrusion and the quantity of material that cuts the two etc. constitute.
The internal diameter size of the aperture surface of the hole portion by will taking turns hub wheel is set at littler than the greatest diametrical dimension of the circle on the summit that links protuberance, and the greatest diametrical dimension than the recess on the outer diametric plane of the axial region between protuberance is big, can make the projected direction middle part of protuberance corresponding with the position that the hole portion recess of wheel hub wheel forms preceding recess formation face.
In addition, the protuberance of described concavo-convex embedded structure also can be set at the aperture surface of the hole portion of taking turns hub wheel, and make the outer diameter part height of axial region of lateral joint member of hardness ratio Constant velocity joint of the axial end portion of this protuberance at least, by described protuberance of taking turns the hub wheel side is gone into the axial region of lateral joint member from its axial end portion side pressure, utilize this protuberance diametric plane outside the axial region of lateral joint member to form and connect airtight chimeric recess, constitute described concavo-convex embedded structure with protuberance.By making protuberance be absorbed in the outer diametric plane of axial region, the hole portion of wheel hub wheel becomes the state of hole enlargement slightly, and allows moving axially of protuberance, and if move axially and stop, then hole portion in order to return original diameter undergauge.Thus, protuberance and connect airtight with the whole zone, chimeric contact site of the recess (the outer diametric plane of axle) of the chimeric the other side's member of this protuberance.
At this moment, the incorporating section of taking in the portion of extruding is set on the aperture surface of the hole portion of taking turns hub wheel preferably, this extrudes portion by forming and produce based on the described recess that is pressed into.
The diameter dimension of the circular arc on the summit of a plurality of protuberances by making connect apertures portion is littler than the outside dimension of the axial region of lateral joint member, and make the internal diameter size of the hole portion aperture surface between protuberance bigger, can make the projected direction middle part of protuberance corresponding with the position that the recess of axial region forms preceding recess formation face than the outside dimension of the axial region of lateral joint member.
Preferably, make the summation of circumferential thickness of projected direction middle part of protuberance littler than the summation with circumferential thickness cooresponding position, described middle part protuberance of the other side's side chimeric between circumferentially adjacent protuberance.
Preferably concavo-convex embedded structure is configured in the position under the avoiding of roller surface of antifriction-bearing box.That is,, then take turns hub wheel and expand if axial region is pressed into the hole portion of taking turns hub wheel.Because this expands, and produces circumference stress on the roller surface of antifriction-bearing box.At this, circumference stress is the power to the hole enlargement of external diameter direction.Therefore, when race way produces circumference stress, the misgivings that have rolling fatigue life to descend or crack.Therefore, the position under the avoiding of the roller surface by concavo-convex embedded structure being configured in antifriction-bearing box can suppress the generation of the circumference stress of race way.
The invention effect
For the present invention, in concavo-convex embedded structure, owing to radially and circumferentially can not form the loosening gap that produces, therefore chimeric position all helps to transmit moment of rotation, carry-over moment stably, nor can produce noise.And,, therefore improve the intensity at transmission of torque position owing to carry out zero-lash connecting airtight.Therefore, can make bearing apparatus for wheel light weight, compactness.
In addition, owing to apply axial withdrawal force by the axial region to the lateral joint member, and the lateral joint member unloads in hole portion that can the trailing wheel hub wheel, therefore can improve the repairing of each parts, the operation of inspection (maintainability).And, after the repairing of each parts, checking, be pressed into the hole portion of wheel hub wheel once more by axial region with the lateral joint member, can constitute the concavo-convex embedded structure that connect airtight in the whole zone, chimeric contact site of protuberance and recess.Therefore, can constitute the bearing apparatus for wheel that can transmit stable torque once more.
Protuberance by will the either party is provided with in the aperture surface of the hole portion of the outer diametric plane of the axial region of lateral joint member and wheel hub wheel is pressed into the opposing party vertically, can form with this protuberance and connect airtight chimeric recess.Therefore, can form concavo-convex embedded structure reliably.And, need not to form in advance spline part etc. on the member of recess being formed with, highly productive, and it is involutory to need not spline phase place each other, has realized the raising of assembling, and the damage of the flank of tooth can avoid being pressed into the time can be kept stable chimerism.
By bolt, can limit axial region trailing wheel hub wheel and come off vertically, thereby can transmit stable torque for a long time.Especially, by the inwall by the head clamping of the end face of the joint opposition side of the axial region of lateral joint member and bolt component is set, can make bolt stable, and by the location, can make the dimensional accuracy of this bearing apparatus for wheel stable, and the axial length of the concavo-convex embedded structure that disposes vertically can be guaranteed to be stable length, can realize the raising of transmission of torque.
In addition, because the end of fastening wheel hub wheel and apply with respect to the inner ring of antifriction-bearing box and to give pressure, therefore need not oral area by the lateral joint member and inner ring is applied give pressure.Therefore, need not to consider to be pressed into the axial region of lateral joint member, thereby can improve the connectivity (assembling) of wheel hub wheel and lateral joint member the giving pressure of inner ring.Because oral area becomes noncontact shape or surface pressure with the wheel hub wheel be the following low surface pressure of 100Mpa, therefore can prevent the noise that relatively moves and produced to hand of rotation that is caused with the distortion of wheel hub wheel by oral area.
Because with containment member oral area that seals the lateral joint member and the gap of the end of taking turns hub wheel being carried out between the fastening fastening part, therefore can prevent that rainwater or foreign matter from invading this gap, thereby can prevent the deterioration of the connecting airtight property that concavo-convex embedded structure caused by rainwater or foreign matter etc.Because leakproofing material is located between the seat surface and inwall of bolt component, therefore can prevent that rainwater or foreign matter from invading concavo-convex embedded structure from this bolt component, thereby can realize that quality improves, wherein said bolt component carries out bolt to the axial region of wheel hub wheel and lateral joint member.
In addition, the protuberance of described concavo-convex embedded structure is set at the axial region of lateral joint member, and the hardness ratio that makes the axial end portion of this protuberance is taken turns the hole portion inside diameter height of hub wheel, when with described axial region when the axial end portion side pressure of protuberance goes into to take turns the hole portion of hub wheel, the hardness of axial region side can be improved, the rigidity of axial region can be improved.In addition, the protuberance of described concavo-convex embedded structure is set at the aperture surface of the hole portion of taking turns hub wheel, and make the outer diameter part height of axial region of lateral joint member of hardness ratio Constant velocity joint of the axial end portion of this protuberance, with described protuberance of taking turns the hub wheel side when the axial region of lateral joint member is gone in its axial end portion side pressure, owing to need not to carry out the hardness processing (heat treatment) of axial region side, so the highly productive of the lateral joint member of Constant velocity joint.
The incorporating section of the portion of extruding is taken in setting, and this extrudes portion by forming and produce based on the described recess that is pressed into, and thus, can keep (keeping) in this incorporating section the portion of extruding, in can the access to plant not outer vehicle of the portion of extruding etc.That is, the portion of extruding intactly can be accommodated in the incorporating section, need not the processing of removing of the portion of extruding, can realize the erecting work minimizing in man-hour, can realize that the raising of assembly manipulation and cost reduce.
In addition, be configured in recess by projected direction middle part and form on the preceding recess formation face, can make protuberance when being pressed into, be absorbed in recess and form face, thereby form recess reliably protuberance.That is, can obtain the amount of being pressed into respect to the other side's side of protuberance fully.Thus, the formability of concavo-convex embedded structure is stable, and loading of pressing in does not disperse, and can obtain stable transverse strength.
The circumferential thickness of the projected direction middle part of the protuberance by making the high side of hardness is littler than the size with cooresponding position, described middle part between circumferentially adjacent protuberance, can make the circumferential thickness of the projected direction middle part of the protuberance (being formed on the protuberance between recess) that is formed with the recess side become big.Therefore, can make the shearing section of the protuberance (protuberance that the hardness between the recess that forms by forming recess is low) of the other side's side become big, can guarantee transverse strength.And, owing to the transverse tooth thickness of the high protuberance of hardness is little, therefore loading of pressing in is diminished, can realize the raising of embedability.
Position under the avoiding of roller surface by concavo-convex embedded structure being configured in antifriction-bearing box can suppress the generation of the circumference stress of race way.Thus, can prevent rolling fatigue life reduction, crack and the generation of the bad situation of bearing such as stress-corrosion cracking, thereby high-quality bearing can be provided.
Description of drawings
Fig. 1 is the longitudinal sectional drawing that the bearing apparatus for wheel of first embodiment of the present invention is shown.
Fig. 2 A is the amplification profile of the concavo-convex embedded structure of described bearing apparatus for wheel.
Fig. 2 B is the X portion enlarged drawing of the concavo-convex embedded structure of described bearing apparatus for wheel.
Fig. 3 is the section-drawing before being pressed into of described bearing apparatus for wheel.
Fig. 4 is the main portion enlarged drawing of described bearing apparatus for wheel.
Fig. 5 A illustrates the leak free containment member is carried out in the gap between the fastening part of the oral area of the outer ring of described bearing apparatus for wheel and wheel hub wheel, the amplification profile when being to use the O ring.
Fig. 5 B illustrates the leak free containment member is carried out, the amplification profile when being to use packing seal in the gap between the fastening part of the oral area of the outer ring of described bearing apparatus for wheel and wheel hub wheel.
Fig. 6 is the section-drawing that the separation method of concavo-convex embedded structure is shown.
Fig. 7 is the section-drawing that method of press-fitting is shown again.
Fig. 8 is the section-drawing that the variation of concavo-convex embedded structure is shown.
Fig. 9 A is the transverse cross-sectional view that the bearing apparatus for wheel of second embodiment of the present invention is shown.
Fig. 9 B is that the main portion that the bearing apparatus for wheel of second embodiment of the present invention is shown is amplified transverse cross-sectional view.
Figure 10 is the section-drawing of existing bearing apparatus for wheel.
Nomenclature:
1 takes turns hub wheel
2 bearings
3 Constant velocity joints
11 oral areas
12 axial regions
22 hole portions
The 22c inwall
24 inner rings
31 fastening parts
35 protuberances
36 recesses
38 chimeric contacts site
45 extrude portion
50 tapped bore
52 end faces
54 bolt components
The 54a head
57 incorporating sections
58 gaps
59 containment members
The 60a seat surface
The specific embodiment
Below, based on Fig. 1～Fig. 9 embodiments of the present invention are described.The bearing apparatus for wheel of first embodiment shown in Fig. 1, it is integrated that this bearing apparatus for wheel will be taken turns hub wheel 1, multiple row antifriction-bearing box 2 and Constant velocity joint 3, and will take turns hub wheel 1 and intercalation and go into to take turns the axial region 12 of the lateral joint member of the Constant velocity joint 3 in the hole portion 22 of hub wheel 1 and can combine discretely and form via concavo-convex embedded structure M.
As shown in Figure 6, Constant velocity joint 3 constitutes, and primary member has: as the outer ring 5 of lateral joint member; The inner ring 6 as the inner contact member of 5 inboard configuration in the outer ring; Be folded between outer ring 5 and the inner ring 6 and a plurality of balls 7 of transmitting torque; Be folded between outer ring 5 and the inner ring 6 and keep the retainer 8 of ball 7.Inner ring 6 is pressed into its shaft hole diameter 6a by the end 10a with axle 10, and to carry out spline chimeric and can combine with axle 10 transmitting torque.In addition, at the chimeric back-up ring 9 that has an anticreep to use of the end of axle 10 10a.
Outer ring 5 comprises oral area 11 and bar portion (axial region) 12, and oral area 11 is the bowl-shape of an end opening, and sphere 13 within it, equally spaced is formed with a plurality of raceway grooves 14 that extend vertically in a circumferential direction.At the spherical outside surface 15 of inner ring 6, equally spaced be formed with a plurality of raceway grooves 16 that extend vertically in a circumferential direction.
The raceway groove 14 of outer ring 5 and the raceway groove of inner ring 6 16 forms a pair of, is incorporated with the ball that can roll 7 as the transmission of torque key element in by each ball receway that raceway groove 14,16 is constituted at each.Ball 7 is folded between the raceway groove 16 of the raceway groove 14 of outer ring 5 and inner ring 6 and comes transmitting torque.Retainer 8 can be folded between outer ring 5 and the inner ring 6 slidably, and the Internal Spherical Surface 13 of spherical outside surface and outer ring 5 joins, and the spherical outside surface 15 of Internal Spherical Surface and inner ring 6 joins.In addition, though the Constant velocity joint of this situation is represented Rzeppa shape, also can be other the Constant velocity joint such as the undercut type of exempting from of bottom land at each raceway groove 14,16 line part with linearity.
In addition, the peristome of oral area 11 utilizes dust boot 18 sealings.Dust boot 18 comprises large-diameter portion 18a, minor diameter part 18b, links the corrugated part 18c of large-diameter portion 18a and minor diameter part 18b.Large-diameter portion 18a is embedded in the peristome of oral area 11 outward, and it is fastening to utilize dust boot band 19a to carry out under this state, and minor diameter part 18b is embedded in the dust boot installation portion 10b of axle 10 outward, utilizes dust boot band 19b to carry out fastening under this state.
As shown in figures 1 and 3, wheel hub wheel 1 flange 21 that has a portion 20 and be provided with in the end of the joint opposition side of tube portion 20.The hole portion 22 of tube portion 20 possesses the taper hole 22b of axial region embedded hole 22a and joint opposition side, is provided with between axial region embedded hole 22a and taper hole 22b to the outstanding inwall 22c of internal diameter direction.That is, in axial region embedded hole 22a, the axial region 12 of the outer ring 5 of Constant velocity joint 3 is combined with wheel hub wheel 1.In addition, on the end face of the axial region embedded hole opposition side of this inwall 22c, be provided with depressed part 51.
Hole portion 22 has large-diameter portion 46 in the open side than the inner wall opposition side of axial region embedded hole 22a, has minor diameter part 48 than the inner wall side of axial region embedded hole 22a.Between large-diameter portion 46 and axial region embedded hole 22a, be provided with tapering (taper hole) 49a.This tapering 49a and axial region embedded hole 22a being pressed into direction and carrying out undergauge during along the axial region 12 that combines wheel hub wheel 1 and outer ring 5.The taper angle theta of tapering 49a for example is 15 °～75 °.In addition, between axial region embedded hole 22a and minor diameter part 48, be provided with tapering 49b.
Antifriction-bearing box 2 possesses: INT COMP (inner ring) 24, and itself and end difference 23 are chimeric, and this end difference 23 is arranged on the joint side of the tube portion 20 of wheel hub wheel 1; External member 25, itself and the axial region 12 outer embeddings of taking turns hub wheel 1.The two row outboard raceway faces (outer raceway) 26,27 that are provided with in interior week of member 25 externally.The first outboard raceway face 26 is relative with first inboard raceways face (internal raceways) 28 of the axial region periphery that is arranged on wheel hub wheel 1, and the second outboard raceway face 27 is relative with second inboard raceways face (internal raceways) 29 of the outer peripheral face that is arranged on inner ring 24, clamps the ball as rolling body 30 between them.In addition, externally two peristomes of member 25 are equipped with containment member S.And, as external member 25 the outer ring joint 34 (with reference to Fig. 6) that the draft hitch of graphic vehicle body never extends is installed.
In this case, the end of the joint side of fastening wheel hub wheel 1, and utilize the 31 pairs of INT COMP in this fastening part (inner ring) 24 to apply and give pressure.Thus, inner ring 24 can be fixed in wheel hub wheel 1.In addition, be provided with bolt mounting holes 32, and be equipped with at this bolt mounting holes 32 and be used for wheel and brake disc are fixed on boss bolt 33 on this flange 21 at the flange 21 of wheel hub wheel 1.
The axle center part of 5 axial region 12 is provided with the tapped bore 50 to the end face opening of joint opposition side (mouthful opposition side) in the outer ring.The peristome of this tapped bore 50 forms towards open side and expands the tapering 50a that opens.And, be provided with minor diameter part 12b in the end of the joint opposition side of axial region 12 (mouthful opposition side).That is, axial region 12 possesses the main part 12a and the minor diameter part 12b in big footpath.
As shown in Figure 2, for example, concavo-convex embedded structure M comprises: protuberance 35, and it is arranged on axial region 12 and extends vertically; Recess 36, it is formed on the aperture surface (this situation is the aperture surface 37 of axial region embedded hole 22a) of hole portion 22 of wheel hub wheel 1, protuberance 35 and connect airtight with the whole zone of the chimeric contact site 38 of the recess 36 of the chimeric wheel hub wheel 1 of this protuberance 35.That is, at the outer peripheral face of the oral area opposition side of axial region 12 along circumferentially disposing a plurality of protuberances 35 with prescribed distance, the aperture surface 37 of the axial region embedded hole 22a of the hole portion 22 of wheel hub wheel 1 along circumferentially be formed with protuberance 35 chimeric a plurality of recesses 36.That is, spread all over circumferentially full week protuberance 35 and the recess 36 chimeric with it are carried out interference fit.
In this case, the cross section of each protuberance 35 is the triangle (chevron shape) with protruding R shape summit, and the chimeric position of the recess of each protuberance 35 is the scope A shown in Fig. 2 B, is the scope of the midriff of the chevron from the cross section to the mountain top.In addition, between circumferentially adjacent protuberance 35, be formed with gap 40 by internal side diameter at aperture surface 37 than wheel hub wheel 1.
So, can will take turns axial region 12 bindings of the outer ring 5 of hub wheel 1 and Constant velocity joint 3 by concavo-convex embedded structure M.At this moment, as mentioned above, because the end of the joint side of fastening wheel hub wheel 1 also applies by the 31 pairs of INT COMP in this fastening part (inner ring) 24 and gives pressure, need not 11 pairs of inner rings 24 of oral area by outer ring 5 thus applies and gives pressure, and make oral area 11 become the not contactless state of contact with respect to the end (this situation is fastening part 31) of wheel hub wheel 1, but also can contact, in this case, footprint pressure forms below the 100Mpa.
Next, the chimeric method to concavo-convex embedded structure M describes.In this case, as shown in Figure 3, the outer diameter part of axial region 12 is implemented heat curing handle, form spline 41 at this hardened layer H, this spline 41 comprises protuberance 41a and recess 41b vertically.Therefore, the protuberance 41a of spline 41 is carried out cure process, make this protuberance 41a become the protuberance 35 of concavo-convex embedded structure M.This spline 41 is arranged on the minor diameter part side of the main part 12a of axial region 12.In addition, the scope of the hardened layer H in this embodiment is the part of the diapire of external end edge from spline 41 5 the oral area 11 to the outer ring shown in cross hatch portion.Can adopt various heat treatments such as electro-high-frequency hardening or carburizing and quenching as this heat curing processing.At this, electro-high-frequency hardening is a process for quenching of using following principle, and this principle is to put into the part that needs quenching in the coil that high-frequency currents flows, and by the electromagnetic induction effect, produces joule heat, and the conductance object is heated.In addition, carburizing and quenching is to make the surface infiltration/diffusion of carbon from low carbon materials, the method for quenching afterwards.The spline 41 of axial region 12 is formed modulus at the little tooth below 0.5.At this, modulus equals pitch circle diameter divided by the number of teeth.
In addition, aperture surface 37 (that is the aperture surface of axial region embedded hole the 22a) side in the hole portion 22 of taking turns hub wheel 1 forms unhardened (the not as-quenched) of not carrying out the heat curing processing.Making the difference of hardness of unhardened portion of hardened layer H and wheel hub wheel 1 of the axial region 12 of outer ring 5 is more than 20 with HRC.And then, specifically, form the hardness of hardened layer H from 50HRC to 65HRC about, and about forming the hardness of unhardened portion from 10HRC to 30HRC.
At this moment, the projected direction middle part of protuberance 35 is corresponding with the position that recess forms preceding recess formation face (this situation is the aperture surface 37 of the axial region embedded hole 22a of hole portion 22).Promptly, as shown in Figure 3, the internal diameter size D of the aperture surface 37 of axial region embedded hole 22a is set at maximum outside diameter than protuberance 35 is little, promptly greatest diametrical dimension (circumscribed circle diameter) D1 than the circle on the summit that links described protuberance 35 is little, and the outside dimension than the outer diametric plane of the axial region between protuberance is big, promptly the greatest diametrical dimension D2 than the circle at the end of the recess 41b that links spline 41 is big, and wherein said protuberance 35 is as the protuberance 41a of spline 41.Be D2＜D＜D1.And, D1 is set at littler than the aperture size D3 in the hole, big footpath 46 of hole portion 22.
Can be by forming spline 41 as the whole bag of tricks such as the rolling forming processing of existing public method, cutting, punch process, drawing processing.In addition, handle, can adopt various heat treatments such as electro-high-frequency hardening or carburizing and quenching as heat curing.
And, as shown in Figure 3, the axle center of the outer ring 5 of wheel axle center of hub wheel 1 and Constant velocity joint 3 is formed involutory state.Under this state, with respect to of axial region 12 insertions (be pressed into) of wheel hub wheel 1 with outer ring 5.At this moment, as mentioned above, because there is above-mentioned relation in the minimum outer diameter dimension D 2 of the recess of the diameter dimension D of the aperture surface 37 of axial region embedded hole 22a, the maximum outside diameter dimension D 1 of protuberance 35 and spline 41, and the hardness of the hardness ratio aperture surface 37 of protuberance 35 is big more than 30, therefore when axial region 12 being pressed into the hole portion 22 of wheel hub wheel 1, this protuberance 35 is absorbed in aperture surface 37, and protuberance 35 form vertically this protuberance 35 chimeric recess 36.
This is pressed into is to make end face 53 butts of end face 52 and inwall 22c at the minor diameter part 12b of axial region 12, or proceeds to (not shown) till fastening fastening part 31 and the joint end face 11a butt carried out in the end of the joint side of wheel hub wheel 1.Thus, shown in Fig. 2 A, 2B, chimeric contact site 38 integral body of the protuberance 35 of the end of axial region 12 and the recess 36 chimeric with it are connected airtight.That is, the recess formation face (this situation is the aperture surface 37 of the axial region embedded hole 22a of hole portion 22) in the other side's side carries out the transfer printing of the shape of protuberance 35.At this moment, be absorbed in the aperture surface 37 of hole portion 22 by making protuberance 35, hole portion 22 forms hole enlargement state slightly and allows moving axially of protuberance 35, and when moving axially when stopping, hole portion 22 will return original diameter and carry out undergauge.In other words, when protuberance 35 was pressed into, elastic deformation radially took place in wheel hub wheel 1, and giving of this elastic deformation amount pressed the flank of tooth (surface at the chimeric position of recess) that is applied to protuberance 35.Therefore, the chimeric position of the recess of protuberance 35 integral body can form the concavo-convex embedded structure M that connects airtight with respect to its corresponding concave part 36 reliably.That is,, on the aperture surface of the hole portion 12 of taking turns hub wheel 1, be formed with the female splines 42 that connects airtight with male splines 41 by the spline (male splines) 41 of axial region 12 sides.
So, though constitute concavo-convex embedded structure M, the concavo-convex embedded structure M of this situation is configured in the position under the avoiding of roller surface 26,27,28,29 of antifriction-bearing box 2.At this, the position was with respect to the ball contact part position of roller surface 26,27,28,29 and not cooresponding diametrically position under what is called was avoided.
In addition, after being pressed into, bolt component 54 is spirally connected from the tapped bore 50 of joint opposition side and axial region 12.As shown in Figure 3, bolt component 54 comprises flanged head 54a and screw spindle part 54b.Screw spindle part 54b has base portion 55a, the main part 55b of path, the threaded portion 55c of front in big footpath.In this case, be provided with through hole 56,, and the tapped bore 50 of threaded portion 55c and axial region 12 be spirally connected slotting logical this through hole 56 of the axial region 54b of bolt component 54 at inwall 22c.As shown in Figure 3, the aperture d1 of through hole 56 is set at more bigger than the outside diameter d 2 of the base portion 55a in the big footpath of axial region 54b.Specifically, 0.05mm＜d1-d2＜0.5mm.In addition, the maximum outside diameter of threaded portion 55c forms identical or more smaller than the external diameter of the base portion 55a degree of external diameter with the base portion 55a in big footpath.
So, be spirally connected, and make the flange part 60 of head 54a of bolt component 54 chimeric with the depressed part 51 of inwall 22c by making the bolt component 54 and the tapped bore 50 of axial region 12.Thus, the end face 52 of the joint opposition side by axial region 12 and the head 54a of bolt component 54 come clamping inwall 22c.
But, in the present invention, make oral area 11 become non-contacting contactless state or contact with the surface pressure below the 100Mpa with respect to the end (this situation is fastening part 31) of wheel hub wheel 1.That is, between the 11a of the outside, the end of fastening part 31 of taking turns hub wheel 1 and oral area 11, be provided with gap 58.Therefore, shown in Fig. 5 A, 5B, preferably stop up this gap 58 with containment member 59.In this case, gap 58 is formed between outside, the end 11a of the fastening part 31 of trailing wheel hub wheel 1 and oral area 11 between the large-diameter portion 12a of axial region embedded hole 22a and axial region 12.In this embodiment, containment member 59 is configured in the fastening part 31 of wheel hub wheel 1 and the bight of large-diameter portion 12a.In addition, as containment member 59, can be the O ring shown in Fig. 5 A etc., also can be the packing seal shown in Fig. 5 B etc.
In addition, leakproofing material (not shown) is located between the seat surface 60a and inwall 22c of bolt component 54.In this case, for example, also can on the seat surface 60a of bolt component 54, apply following leakproofing material (aquaseal), that is, and coating after cure and between the bottom surface of the depressed part 51 of seat surface 60a and inwall 22c, can bring into play the leakproofing material (aquaseal) that constitutes by various resins of leak tightness.In addition, as the sealing material, be chosen in the leakproofing material that does not worsen in the atmosphere of using this bearing apparatus for wheel.
So, in the present invention, the concavo-convex embedded structure M that connect airtight in the protuberance 35 that can form axial region 12 reliably and the 38 whole zones, chimeric contact site of the recess 36 of wheel hub wheel 1.And, in forming the member of recess 36, need not to form spline part etc., highly productive, and it is involutory to need not spline phase place each other, realizes the raising of assembling, and the damage of the flank of tooth can avoid being pressed into the time can be kept stable chimerism.
In addition, because concavo-convex embedded structure M connects airtight the protuberance 35 and chimeric contact site 38 integral body of recess 36, therefore in this embedded structure M, radially reaching the gap that circumferencial direction does not form loosening generation.Therefore, chimeric position all helps the moment of rotation transmission, can transmit stable moment, and, do not produce noise yet.
In addition, when the axial region 12 of foreign steamer 5 is pressed into the hole portion 22 of wheel hub wheel 1, can constitutes this centering and be pressed into guide portion when beginning with tapering 49a.Thus, the axial region 12 of outer ring 5 can not produced with respect to the hole portion 22 of wheel hub wheel 1 with departing from be pressed into, can transmit stable torque.
In addition, in the hole portion 22 of wheel hub wheel 1 when being formed with tapering 49a, it is involutory to carry out axial region 12 with outer ring 5 heart when being pressed into the hole portion 22 of wheel hub wheel 1, and has wheel hub wheel 1 and heart skew, the heart bevelled of the outer ring 5 of Constant velocity joint 3 to worry.Therefore, as the tilt angle theta (with reference to Fig. 3) of tapering 49a, as mentioned above, preferred 15 °～75 °.That is, if less than 15 °, though then can bring into play function as guide, the axial length of tapering 49a is elongated, and push operation is poor, and has the axial length of wheel hub wheel 1 to become big tendency.And, if surpass 75 °, then there is the heart of causing out-of-position to worry.
But if axial region 12 is pressed into the hole portion 22 of taking turns hub wheel 1, then as shown in Figure 4, the portion that extrudes 45 of formation is received into the incorporating section 57 by the space that the space constituted of the outside diameter of the minor diameter part 12b that is arranged on axial region 12 when curling.At this, extrude portion 45 and be the quantity of material that protuberance 35 embeds the capacity of (chimeric) recesses 36, by the quantity of material that extrudes from the recess 36 that forms or by the quantity of material that cuts in order to form recess 36 or by the quantity of material of extrusion and the quantity of material that cuts the two etc. constitute.Therefore, from the cutting of the aperture surface of hole portion 22 down or the part of the material that extrudes promptly extrude portion 45 and enter in the incorporating section 57.
So, take in the incorporating section 57 of the portion of extruding 45 by setting, can keep (keeping) in this incorporating section 57 portion of extruding 45, extrude in can the access to plant not outer vehicle of portion 45 etc., this extrudes portion 45 by forming and produce based on the above-mentioned recess that is pressed into.That is, the portion of extruding 45 intactly can be accommodated in incorporating section 57, need not the processing of removing of the portion of extruding 45, can realize the erecting work minimizing in man-hour, can realize that the raising of erecting work and cost reduce.
By bolt, can limit axial region trailing wheel hub wheel 1 along axially the coming off of axial region 12, thereby can transmit stable torque for a long time.Especially, by being provided with by the end face 52 of the joint opposition side of the axial region 12 of outer ring 5 and the inwall 22c of the head 54a clamping of bolt component 54, can make bolt stable, and by the location, can make the dimensional accuracy of this bearing apparatus for wheel stable, and the axial length of the concavo-convex embedded structure M that disposes vertically can be guaranteed to be stable length, can realize the raising of transmission of torque.
In addition, because the end of fastening wheel hub wheel 1 and apply with respect to the inner ring 24 of antifriction-bearing box 2 and to give pressure, therefore need not oral area by outer ring 5 and inner ring is applied give pressure.Therefore, need not to consider to be pressed into the axial region 12 of outer ring 5, thereby can improve the connectivity (assembling) of wheel hub wheel 1 and outer ring 5 the giving pressure of inner ring 23.Because therefore oral area 11 and wheel 1 one-tenth noncontact shape of hub wheel or low surface pressure can prevent by the contact noise that produced of oral area 11 with wheel hub wheel 1.
Owing to come the oral area 11 of sealed outer ring 5 and gap 58 between the fastening fastening part 31 carried out in the end of taking turns hub wheel 1 with containment member 59, therefore can prevent that rainwater or foreign matter from invading this gap 58, thereby can prevent the deterioration of the connecting airtight property that concavo-convex embedded structure M caused by rainwater or foreign matter etc.Because leakproofing material is located between the seat surface 60a and inwall 22c of bolt component 54, therefore can prevent that rainwater or foreign matter are from the concavo-convex embedded structure M of these bolt component 54 intrusions, thereby can realize that quality improves, 54 pairs of wheels of wherein said bolt component hub wheel 1 carries out bolt with the axial region 12 of outer ring 5.
In addition, be configured in recess by projected direction middle part and form on the preceding recess formation face, can make protuberance 35 when being pressed into, be absorbed in recess and form face, thereby form recess 36 reliably protuberance 35.That is, can obtain the amount of being pressed into respect to the other side's side of protuberance 35 fully.Thus, the formability of concavo-convex embedded structure M is stable, and loading of pressing in does not disperse, and can obtain stable transverse strength.
In the embodiment shown in Fig. 1 waits, 5 axial region 12 is provided with the protuberance 35 of concavo-convex embedded structure M in the outer ring, and the hardness ratio that makes the axial end portion of this protuberance 35 is taken turns the hole portion inside diameter height of hub wheel 1, if axial region 12 is pressed into the hole portion 22 of wheel hub wheel 1, then can improve the hardness of axial region side, thereby can improve the intensity of axial region.
Position under the avoiding of roller surface by concavo-convex embedded structure M being configured in antifriction-bearing box 2 can suppress the generation of the circumference stress of race way.Thus, can prevent rolling fatigue life reduction, crack and the generation of the bad situation of bearing such as stress-corrosion cracking, thereby high-quality bearing 12 can be provided.
Shown in above-mentioned embodiment, be little tooth 0.5 below because the spline 41 that forms at axial region 12 uses moduluses, therefore can realize the raising of the formability of this spline 41, and the reduction of realization loading of pressing in.In addition, owing to can constitute protuberance 35, therefore can form this protuberance 35 simply with low cost with the spline that forms usually at this kind axle.
In addition, owing to come the oral area 11 of sealed outer ring 5 and gap 58 between the fastening fastening part 31 carried out in the end of taking turns hub wheel 1 with containment member 59, therefore can prevent that rainwater or foreign matter from invading this gap 58, thereby can prevent the deterioration of the connecting airtight property that concavo-convex embedded structure M caused by rainwater or foreign matter etc.Because leakproofing material is located between the seat surface 60a and inwall 22c of bolt component 54, therefore can prevent that rainwater or foreign matter are from the concavo-convex embedded structure M of these bolt component 54 intrusions, thereby can realize that quality improves, 54 pairs of wheels of wherein said bolt component hub wheel 1 carries out bolt with the axial region 12 of outer ring 5.
In above-mentioned spline shown in Figure 2 41, the spacing of protuberance 41a is set at identical with the spacing of recess 41b.Therefore, in the above-described embodiment, shown in Fig. 2 B, the circumferential size L0 with cooresponding position, above-mentioned middle part that the circumferential thickness L of the projected direction middle part of protuberance 35 and circumferentially adjacent protuberance are 35 is roughly the same.
Relative therewith, as shown in Figure 8, can make the circumferential thickness L2 of projected direction middle part of protuberance 35 littler than the circumferential size L1 with cooresponding position, above-mentioned middle part of 35 of circumferentially adjacent protuberances.That is, in the spline 41 that axial region 12 forms, make circumferential thickness (transverse tooth thickness) L2 of projected direction middle part of protuberance 35 littler than circumferential thickness (transverse tooth thickness) L1 in the projected direction middle part of the protuberance 43 of 35 chimeric wheel hub wheel 1 sides of protuberance.
Therefore, with the summation ∑ (B1+B2+B3+ of the transverse tooth thickness of the protuberance 35 of the complete cycle of axial region 12 sides ...) be set at summation ∑ (A1+A2+A3+ than the transverse tooth thickness of the protuberance 43 (double wedge) of wheel hub wheel 1 side ...) little.Thus, can make the shearing section of the protuberance 43 of wheel hub wheel 1 side become big, can guarantee torsional strength.And, because the transverse tooth thickness of protuberance 35 is little, therefore can reduce loading of pressing in, can realize the raising of embedability.When the summation of the circumferential thickness of protuberance 35 than the summation of the circumferential thickness of the protuberance 43 of the other side side hour, all the circumferential size L1 than 35 of circumferentially adjacent protuberances is little to need not to make circumferential thickness L2 in all protuberances 35.That is, both can make circumferential measure-alike between the circumferential thickness of the protuberance arbitrarily 35 in a plurality of protuberances 35 and circumferentially adjacent protuberance, also can be bigger than its circumferential size, as long as summation is little.In addition, the cross section of the protuberance among Fig. 8 35 is trapezoidal (Fuji shape).
But, if by bolt component 54 spiral shells are moved back, taking off bolt component, then outer ring 5 trailing wheel hub wheels 1 can be extracted.That is, the inlay resultant force of concavo-convex embedded structure M is that green phase applies the withdrawal force more than the specified force for outer ring 5 and the inlay resultant force that can extract.
For example, utilize anchor clamps shown in Figure 6 70 that wheel hub wheel 1 is separated with Constant velocity joint 3.Anchor clamps 70 possess: base 71, with the tapped bore 72 of this base 71 pushing of can spiral shell advancing that spiral shell screws togather with moving back with bolt component 73, and the threaded shaft 76 that screws togather of the tapped bore 50 of axial region 12.Be provided with perforation 74 at base 71, insert the bolt 33 that is connected with wheel hub wheel 1 at this perforation 74, nut member 75 screws togather with this bolt 33.At this moment, base 71 overlaps with the flange 21 of wheel hub wheel 1, and base 71 is installed on wheel hub wheel 1.
So, before base 71 being installed on wheel hub wheel 1 back or mounting seat 71, the threaded shaft 76 and the tapped bore 50 of axial region 12 are screwed togather, so that base portion 76a is outstanding to the joint opposition side from inwall 22c.The overhang of this base portion 76a is set at longer than the axial length of concavo-convex embedded structure M.Threaded shaft 76 is configured in same axis (on the axle center of this bearing apparatus for wheel) in the heart with pushing with bolt component 73.
After this, as shown in Figure 6, make to push to be spirally connected, under this state, advance to threaded shaft 76 side spiral shells as shown by arrows with the tapped bore 72 of bolt component 73 from joint opposition side and base 71.At this moment, because threaded shaft 76 is configured in same axis (on the axle center of this bearing apparatus for wheel) in the heart with pushing with bolt component 73, so advances by this spiral shell, push with bolt component 73 threaded shaft 76 is pushed to the direction of arrow.Thus, move to the direction of arrow with respect to wheel hub wheel 1 outer ring 5, thereby outer ring 5 trailing wheel hub wheels 1 come off.
In addition, the state that 5 trailing wheel hub wheels 1 come off from the outer ring for example reuses bolt component 54, and wheel hub wheel 1 and outer ring 5 are linked.That is, take off base 71 and take off the state of threaded shaft 76, as shown in Figure 7, bolt component 54 is screwed togather via through hole 56 with the tapped bore 50 of axial region 12 from axial region 12 as trailing wheel hub wheel 1.Under this state, it is involutory that the male splines 41 that makes axial region 12 sides and the female splines 42 that was pressed into the wheel hub wheel 1 of formation last time carry out phase place.
Then, under this state, bolt component 54 is advanced with respect to tapped bore 50 spiral shells.Thus, axial region 12 embeds in the wheel hub wheel 1.At this moment, hole portion 22 becomes the state of hole enlargement slightly, and allows axially entering of axial region 12, if move axially and stop, then hole portion 22 in order to return original diameter undergauge.Thus, and be pressed into last time identically, the chimeric position of the recess integral body that can constitute protuberance 35 reliably is with respect to the concavo-convex embedded structure M that connects airtight with its corresponding concave part 36.
Especially, when bolt component 54 was advanced with respect to tapped bore 50 spiral shells, as shown in Figure 7, the base portion 55a of bolt component 54 became and through hole 56 cooresponding states.And, because the aperture d1 of through hole 56 is set at more bigger (specifically than the outside diameter d 2 of the base portion 55a in the big footpath of axial region 54b, 0.05mm＜d1-d2＜0.5mm), guide when therefore the internal diameter of the external diameter of the base portion 55a of bolt component 54 and through hole 56 can constitute bolt component 54 spiral shells and advances tapped bore 50 can not produce heart skew and axial region 12 is pressed into the hole portion 22 of taking turns hub wheel 1.In addition, as the axial length of through hole 56, if too short, the then guiding that can't play stably, opposite if then the gauge of inwall 22c becomes big long, can't guarantee the axial length of concavo-convex embedded structure M, and the weight of wheel hub wheel 1 increases.Therefore, consider these situations, can carry out various changes.
In addition, expand the tapering 50a that opens, therefore the advantage that tapped bore 76 or bolt component 54 and tapped bore 50 are screwed togather is easily arranged because the peristome of the tapped bore 50 of axial region 12 formed towards open side.
Yet, in the first time (shaping recess 36 is pressed on the aperture surface 37 in hole portion 22),,, need to use punching machine etc. therefore in order to be pressed into because loading of pressing in is bigger.Relative therewith, be pressed into once more such, because loading of pressing in is littler than primary loading of pressing in, therefore can not use punching machine and stable and correctly axial region 12 is pressed into the hole portion 22 of wheel hub wheel 1.Therefore, can carry out then and there outer ring 5 and wheel the separating, link of hub wheel 1.
So, owing to apply axial withdrawal force by the axial region 12 to outer ring 5, outer ring 5 is unloaded by hole portion 22 that can trailing wheel hub wheel 1, therefore can improve the repairing of each parts, the operation of inspection (maintainability).And, after the repairing of each parts, checking, be pressed into the hole portion 22 of wheel hub wheel 1 once more by axial region 12 with outer ring 5, can constitute the concavo-convex embedded structure M that connect airtight in protuberance 35 and the 38 whole zones, chimeric contact site of recess 36.Therefore, can constitute the bearing apparatus for wheel that can transmit stable torque once more.
Yet, in the respective embodiments described above, forming spline 41 in axial region 12 sides, this spline 41 constitutes protuberance 35, and the spline 41 of this axial region 12 is implemented cure process, and the aperture surface of wheel hub wheel 1 is unhardened (crude material).Relative therewith, as shown in Figure 9, also can form the spline 61 (constituting) of having implemented cure process, and axial region 12 is not applied cure process at the aperture surface of the hole portion 22 of taking turns hub wheel 1 by raised line 61a and recessed 61b.In addition, this spline 61 also can be by forming as various job operations such as the broaching processing of public method, cutting, punch process, drawing processing.In addition, processing also can be adopted various heat treatments such as electro-high-frequency hardening, carburizing and quenching as heat curing.
In this case, the projected direction middle part of protuberance 35 is corresponding with the position that recess forms preceding recess formation face (the outer diametric plane of axial region 12).Promptly, be set at circle diameter size (the minimum diameter size of the protuberance 35) D4 that links the summit of protuberance 35 littler than the outside dimension D6 of axial region 12, circle diameter size (the chimeric internal diameter size with the hole aperture surface between the protuberance) D5 at the end that links the recess 61b of spline 61 is set at bigger than the outside dimension D6 of axial region 12, wherein this protuberance 35 is as the protuberance 61a of spline 61.Be D4＜D6＜D5.
When axial region 12 being pressed into the hole portion 22 of wheel hub wheel 1, the protuberance 35 by wheel hub wheel 1 side can form at the outer peripheral face of axial region 12 this protuberance 35 chimeric recess 36.Thus, chimeric contact site 38 integral body of protuberance 35 and the recess chimeric with it are connected airtight.
At this, chimeric contact site 38 is scope B shown in Figure 9, is the scope from the midriff of the chevron in the cross section of protuberance 35 to the mountain top.In addition, between circumferentially adjacent protuberance 35, be formed with gap 62 by outside diameter at outer peripheral face than axial region 12.
Even in this case, because by being pressed into the portion of extruding 45 that is formed with, therefore also preferred the setting taken in this incorporating section of extruding portion 45 57.Owing to extrude the oral-lateral that portion 45 is formed on axial region 12, therefore the incorporating section be arranged on wheel hub wheel 1 side.
So, the protuberance 35 of concavo-convex embedded structure M is set at the aperture surface 37 of the hole portion 22 of taking turns hub wheel 1, and make the outer diameter part height of axial region 12 of hardness ratio outer ring 5 of the axial end portion of this protuberance 35, in the parts that are pressed into, handle (heat treatment) owing to need not to carry out the hardness of axial region side, so the highly productive of the lateral joint member of Constant velocity joint (outer ring 5).
More than embodiments of the present invention are illustrated, but the present invention is not defined in above-mentioned embodiment, can carry out various distortion, for example, shape as the protuberance 35 of concavo-convex embedded structure M, in above-mentioned embodiment shown in Figure 2, be the section triangle shape, in embodiment shown in Figure 8 cross section trapezoidal (Fuji shape), but can adopt different shapes such as semi-circular shape beyond above-mentioned, half-oval shaped, rectangular shape, the area of protuberance 35, number, circumferentially disposition interval etc. also can change arbitrarily.That is, need not to form spline 41 and with protuberance (double wedge) 41a of this spline 41 protuberance 35 as concavo-convex embedded structure M, can be the such parts of key, also can be the parts that form curvilinear waveform involutory surface.In a word, as long as the protuberance 35 that disposes vertically can be pressed into the other side's side, utilize this protuberance 35 to form with protuberance 35 and connect airtight chimeric recess 36 in the other side's side, and chimeric contact site 38 integral body of protuberance 35 and the recess 36 chimeric with it are connected airtight, and can transmit moment of rotation get final product between wheel hub wheel 1 and Constant velocity joint 3.
As the hole portion 22 of wheel hub wheel 1 also can be profile holes such as polygonal hole beyond the circular hole, and the cross sectional shape of end that embeds the axial region 12 of this hole portion 22 also can be the odd-shaped cross sections such as polygon beyond the round section.And, when axial region 12 being pressed into wheel hub wheel 1,, therefore need not to make the single-piece hardness height of protuberance 35 owing to can only make being pressed into of protuberance 35 begin the end than the hardness height that is formed with recess 36 positions.Though in Fig. 2, be formed with gap 40, also can protuberance 35 paddy portion also be absorbed in the aperture surface 37 of wheel hub wheel 1.In addition, form the difference of hardness of face side as protuberance 35 sides and the recess that utilizes protuberance 35 to form, though preferably be more than 30 as described above with HRC, as long as can be pressed into protuberance 35, also can be less than 30 points.
The end face of protuberance 35 (being pressed into starting end) is in the above-described embodiment for respect to the face of axial quadrature, but also can be with respect to axially with predetermined angular bevelled face.In this case, both can tilt to outside diameter, also can tilt to projection to the protuberance opposition side from internal side diameter.
In addition, also the little recess that disposes with prescribed distance along circumferentially can be set on the aperture surface 37 of the hole portion 22 of taking turns hub wheel 1.Need be littler as little recess than the volume of recess 36.By little recess so is set, can realize the raising of the embedability of protuberance 35.That is,, the capacity of the portion that extrudes 45 that when being pressed into protuberance 35, forms can be reduced, reducing of resistance of pressing in can be realized by little recess is set.In addition, owing to can reduce the portion of extruding 45, therefore the volume of incorporating section 57 is diminished, can realize the raising of the intensity of the processability of incorporating section 57 and axial region 12.In addition, the shape of little recess can adopt different shapes such as half elliptic, rectangle, and number also can be provided with arbitrarily.
Rolling body 30 as bearing 2 also can use roller.And,, also can be the first generation, the second generation or even the 4th generation though show the bearing apparatus for wheel of the third generation in the above-described embodiment.In addition, when being pressed into protuberance 35, can fixedly being formed with a side of recess 36 and moving the side be formed with protuberance 35, also can fixedly be formed with a side of protuberance 35 on the contrary and move a side that is formed with recess 36, the both is moved.In addition, in Constant velocity joint 3, also can make inner ring 6 integrated by the concavo-convex embedded structure M that puts down in writing in the respective embodiments described above with axle 10.
Constitute seat surface 60a side application of resin in the above-described embodiment though be located in the seat surface 60a of bolt component 54 and the leakproofing material between the inwall 22c to bolt component 54, but on the contrary also can be in inwall 22c side application of resin, 54 pairs of wheels of wherein said bolt component hub wheel 1 carries out bolt with axial region 12.And, also can be in seat surface 60a side and inwall 22c side application of resin.In addition, when bolt component 54 is spirally connected,, then can omit such leakproofing material if the connecting airtight property of the bottom surface of the depression 51 of the seat surface 60a of bolt component 54 and inwall 22c is good.That is,, can improve connecting airtight property with the seat surface 60a of bolt component 54 by grinding the bottom surface of depression 51.Certainly, under the state of so-called turning processing,, just can not omit leakproofing material even do not grind the bottom surface of depression 51 as long as can bring into play connecting airtight property.
Industrial applicibility
The present invention can be used for wheel is rotation bearing apparatus for wheel freely with respect to body mount in the vehicles such as motor vehicle.

Claims (15)

1. bearing apparatus for wheel, it will be taken turns hub wheel, multiple row antifriction-bearing box, Constant velocity joint and carry out modularity, and the axial region that wheel hub wheel and intercalation go into to take turns the lateral joint member of the Constant velocity joint in the hole portion of hub wheel is combined into and can separates via concavo-convex embedded structure, described bearing apparatus for wheel is characterised in that
Will be in the aperture surface of the hole portion of the outer diametric plane of the axial region of lateral joint member and wheel hub wheel the either party be provided with and the protuberance that extends in the axial direction is pressed into the opposing party vertically, and utilize protuberance to connect airtight chimeric recess with protuberance in the opposing party's formation, thereby the described concavo-convex embedded structure that connect airtight in the whole zone, chimeric contact site that constitutes protuberance and recess, and this concavo-convex embedded structure is allowed the separation that produces by applying axial withdrawal force.
2. bearing apparatus for wheel as claimed in claim 1 is characterized in that,
The axial region of wheel hub wheel and lateral joint member is carried out bolt via bolt component, and described bolt component and the tapped bore that is formed on vertically on the axle center part of axial region of lateral joint member screw togather.
3. bearing apparatus for wheel as claimed in claim 2 is characterized in that,
The axial region of wheel hub wheel and lateral joint member is under the bolt state, and the inwall that the bolt seat surface is used is arranged on the hole portion of taking turns hub wheel.
4. as each described bearing apparatus for wheel in the claim 1～3, it is characterized in that,
The oral area of inner contact member is housed in described lateral joint member possesses and from the bottom of this oral area the outstanding described axial region that is provided with, the end of wheel hub wheel is fastened and the inner ring with the antifriction-bearing box of the outer embedding of wheel hub wheel applied give pressure.
5. bearing apparatus for wheel as claimed in claim 4 is characterized in that,
Carry out between the fastening fastening part gap being set at the oral area of described lateral joint member and to the end of wheel hub wheel.
6. bearing apparatus for wheel as claimed in claim 5 is characterized in that,
Configuration is carried out the leak free containment member to the gap between the fastening part of the oral area of described lateral joint member and wheel hub wheel.
7. as each described bearing apparatus for wheel in the claim 2～6, it is characterized in that,
Leakproofing material is located between the seat surface and inwall of bolt component, and described bolt component carries out bolt to the axial region of wheel hub wheel and lateral joint member.
8. as each described bearing apparatus for wheel in the claim 1～7, it is characterized in that,
The protuberance of described concavo-convex embedded structure is set at the axial region of lateral joint member, and the hardness ratio that makes the axial end portion of this protuberance is at least taken turns the hole portion inside diameter height of hub wheel, by described axial region is gone into to take turns the hole portion of hub wheel from the axial end portion side pressure of protuberance, utilize this protuberance to connect airtight chimeric recess with protuberance, constitute described concavo-convex embedded structure in the hole portion aperture surface formation of wheel hub wheel.
9. bearing apparatus for wheel as claimed in claim 8 is characterized in that,
Take in the incorporating section of the portion of extruding in the axial region outside diameter setting of being abutted against an opposition side than concavo-convex embedded structure, this extrudes portion by forming and produce based on the described recess that is pressed into.
10. bearing apparatus for wheel as claimed in claim 8 or 9 is characterized in that,
The internal diameter size of aperture surface of the hole portion of wheel hub wheel is set at littler than the greatest diametrical dimension of the circle on the summit that links protuberance, and bigger than the greatest diametrical dimension of the recess on the outer diametric plane of the axial region between protuberance.
11. as each described bearing apparatus for wheel in the claim 1～7, it is characterized in that,
The protuberance of described concavo-convex embedded structure is set at the aperture surface of the hole portion of taking turns hub wheel, and make the outer diameter part height of axial region of lateral joint member of hardness ratio Constant velocity joint of the axial end portion of this protuberance at least, by described protuberance of taking turns the hub wheel side is gone into the axial region of lateral joint member from its axial end portion side pressure, utilize this protuberance diametric plane outside the axial region of lateral joint member to form and connect airtight chimeric recess, constitute described concavo-convex embedded structure with protuberance.
12. bearing apparatus for wheel as claimed in claim 11 is characterized in that,
The incorporating section of taking in the portion of extruding is set on the aperture surface of the hole portion of taking turns hub wheel, and this extrudes portion by forming and produce based on the described recess that is pressed into.
13. as claim 11 or 12 described bearing apparatus for wheel, it is characterized in that,
Make the diameter dimension of circular arc on summit of a plurality of protuberances that link axis hole littler, and make the internal diameter size of the hole portion aperture surface between protuberance bigger than the outside dimension of the axial region of lateral joint member than the outside dimension of the axial region of lateral joint member.
14. as each described bearing apparatus for wheel in the claim 1～13, it is characterized in that,
Make protuberance the projected direction middle part circumferential thickness summation than between circumferentially adjacent protuberance the summation with circumferential thickness cooresponding position, described middle part protuberance of chimeric the other side's side little.
15. as each described bearing apparatus for wheel in the claim 1～14, it is characterized in that, concavo-convex embedded structure be configured in the position under the avoiding of roller surface of described antifriction-bearing box.
CN2008801042023A 2007-08-30 2008-08-25 Bearing device for wheel Active CN101784398B (en)

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US20100209035A1 (en) 2010-08-19
WO2009028441A1 (en) 2009-03-05
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CN101784398B (en) 2012-11-28
US8356943B2 (en) 2013-01-22

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